Studies About The Integration System Of Wire-line And Wireless Access Technologies Under Various Services

With the expansion of services offered over the Internet, a dramatic increase of bandwidth has been facilitated both in the metro core network and the subscriber side. This results in a growing gap between the capacities of the core and local networks and the much lower capacities of the access networks inbetween, the so-called "first mile" problem. To address the bottleneck problem in the first mile, the integration of Ethernet passive optical network (EPON) and Worldwide Interoperability for Microwave Access (WiMAX) was recently proposed, aiming to combine the benefits of optical fiber capacity and wireless network mobility.After considering several integration plans, this paper proposes a modified integration structure of EPON and WiMAX systems based on Microwave-over-Fiber. Besides, this paper proposes a quality of service (QoS) architecture to enhance the integration framework. The proposed QoS architecture effectively pairs optical fiber capacity with wireless communications mobility. It moreover facilitates quality of service (QoS) continuity across the optical/wireless interface.Firstly, this paper proposes a modified integration structure of EPON and WiMAX systems. We use a different way to transfer these signals. As is shown in the paper, we use the frenquency band of the fiber to transfer the wireless signal from WiMAX networks, and we use the baseband of the fiber to transfer the wireline signal from EPON networks. Secondly, this paper proposes a two-layer scheduling structure for uplink bandwidth allocation, and proposes a scheduling discipline for each part of the architecture. Last but not least, this paper proposes an adaptive bandwidth request method for real-time service flows; it greatly improves the delay performance of the real-time services according to the simulation result.